It is aval, as a bolt in unit with all the hangers an flange.Any large muffler shop or parts supplier should carry them.This is an oem style but Walker also also makes Dyno-max and Ultra-flow mufflers.
You can try it yourself of some shops may include install in the price(that's what my friend does at his Carline muffler shop).

Hope this helps.Now i'm craving Bar-B Barn ribs :yumyum: :yumyum:.